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Title: Multi-megabar Dynamic Strength Measurements of Ta, Au, Pt, and Ir

Abstract

Magnetic loading was used to shocklessly compress four different metals to extreme pressures. Velocimetry monitored the behavior of the material as it was loaded to a desired peak state and then decompressed back down to lower pressures. Two distinct analysis methods, including a wave profile analysis and a novel Bayesian calibration approach, were employed to estimate quantitative strength metrics associated with the loading reversal. Specifically, we report for the first time on strength estimates for tantalum, gold, platinum, and iridium under shockless compression at strain rates of \(\sim 5 \times 10^5\)/s in the pressure range of \(\sim \) 100–400 GPa. The magnitude of the shear stresses supported by the different metals under these extreme conditions are surprisingly similar, representing a dramatic departure from ambient conditions.

Authors:
ORCiD logo; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1651213
Alternate Identifier(s):
OSTI ID: 1667426
Report Number(s):
SAND-2020-9294J
Journal ID: ISSN 2199-7446; PII: 256
Grant/Contract Number:  
AC04-94AL85000; NA-0003525; NA0003525
Resource Type:
Published Article
Journal Name:
Journal of Dynamic Behavior of Materials
Additional Journal Information:
Journal Name: Journal of Dynamic Behavior of Materials; Journal ID: ISSN 2199-7446
Publisher:
Springer
Country of Publication:
Germany
Language:
English
Subject:
36 MATERIALS SCIENCE; dynamic strength; high pressure; high strain rate; ramp compression; Bayesian calibration

Citation Formats

Brown, J. L., Davis, J. -P., and Seagle, C. T. Multi-megabar Dynamic Strength Measurements of Ta, Au, Pt, and Ir. Germany: N. p., 2020. Web. doi:10.1007/s40870-020-00256-6.
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Brown, J. L., Davis, J. -P., & Seagle, C. T. Multi-megabar Dynamic Strength Measurements of Ta, Au, Pt, and Ir. Germany. https://doi.org/10.1007/s40870-020-00256-6
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Brown, J. L., Davis, J. -P., and Seagle, C. T. Fri . "Multi-megabar Dynamic Strength Measurements of Ta, Au, Pt, and Ir". Germany. https://doi.org/10.1007/s40870-020-00256-6.
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@article{osti_1651213,
title = {Multi-megabar Dynamic Strength Measurements of Ta, Au, Pt, and Ir},
author = {Brown, J. L. and Davis, J. -P. and Seagle, C. T.},
abstractNote = {Magnetic loading was used to shocklessly compress four different metals to extreme pressures. Velocimetry monitored the behavior of the material as it was loaded to a desired peak state and then decompressed back down to lower pressures. Two distinct analysis methods, including a wave profile analysis and a novel Bayesian calibration approach, were employed to estimate quantitative strength metrics associated with the loading reversal. Specifically, we report for the first time on strength estimates for tantalum, gold, platinum, and iridium under shockless compression at strain rates of \(\sim 5 \times 10^5\)/s in the pressure range of \(\sim \) 100–400 GPa. The magnitude of the shear stresses supported by the different metals under these extreme conditions are surprisingly similar, representing a dramatic departure from ambient conditions.},
doi = {10.1007/s40870-020-00256-6},
journal = {Journal of Dynamic Behavior of Materials},
number = ,
volume = ,
place = {Germany},
year = {Fri Aug 28 00:00:00 EDT 2020},
month = {Fri Aug 28 00:00:00 EDT 2020}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1007/s40870-020-00256-6
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Figures / Tables:

Fig. 1 Fig. 1: One-dimensional configuration resulting from a typical Z strength experiment. Current flows between a pair of parallel electrodes and generates a magnetically driven ramp-release wave. The experimental observables are the velocity of the electrode/window interface on the left and sample/window interface on the right.
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    Figures / Tables found in this record:

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